If the old belt is intact, mark the cam pulleys and you won't have a problem.

When going from scratch, the cams should be locked in place first. Then the exhaust cam pulley must be rotated to the advanced position of the VCT (clockwise) while the belt is put on. If the belt is put on while the exhaust cam's pulley is in the retarded position the timing will be out.

"Those who cannot remember the past are condemned to repeat it" -George Santayana